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Asymmetrical Lamb wave mode resonant infrared detector based on lithium niobate thin film.

Authors :
Du, Mingye
Huang, Feixuan
Li, Jiawei
Liu, Yushuai
Xu, Xuankai
Wang, Nan
Wu, Tao
Source :
Applied Physics Letters. 5/6/2024, Vol. 124 Issue 19, p1-6. 6p.
Publication Year :
2024

Abstract

This work explores the infrared (IR) detection capabilities of 750 nm thick Z-cut lithium niobate (LN) thin film resonator at asymmetric modes of various orders: the first, third, fifth, and seventh order asymmetric (A1, A3, A5, and A7), with resonant frequencies of 2.35, 6.68, 11.09, and 15.49 GHz. Under the infrared radiation of 0.575 mW, the responses about admittance minima and frequency drift corresponding to these modes have been experimentally validated. Notably, the A1 mode exhibits the most significant admittance dip response with 2.62 dB, while the A7 mode demonstrates a maximum frequency drift response of 670 kHz. The optimal parameter for noise equivalent power reaches 15.41 pW/Hz1/2, and the optimal detectivity achieves 7.40 × 106 m Hz1/2/W. These findings indicate the immense potential of LN thin-film resonators for infrared sensing applications. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00036951
Volume :
124
Issue :
19
Database :
Academic Search Index
Journal :
Applied Physics Letters
Publication Type :
Academic Journal
Accession number :
177184401
Full Text :
https://doi.org/10.1063/5.0196015